Hey everyone. I thought it would be fun to jot down a list of Pokemon (that currently exist and will potentially exist in the future) of which share multiple real world counterparts. Generally speaking, a Pokemon's design is based off of some Real World™ animal, vegetable, mineral, mythical creature, a combination of said items, or something new entirely. The idea behind this thread is to compile and categorize Pokemon that could be considered the same species. This is not a list to identify the Classification-Species which is listed in the PokeDex, rather try to draw from the original design basis.

We may have to speculate whether or not two or more Pokemon truely could be called 'Brothers' or 'Cousins', but I believe such debate will provide good discussion.

Without further ado, here's what's been added so far. Feel free to add your own.

Note: Evolutionary lines are grouped under the same category, unless vastly different from each other.

* - denotes a Pokemon with multiple or sketchy origins; more than one grouping

Rodents/Mice
Rattata - Raticate
Pikachu - Raichu
Azurill - Marill

Mustelids
Sentret - Furret
Buizel - Floatzel
Linoone

Rabbits
Nidoran (M)
Nidoran (F)
Buneary - Lopunny
Azumarill
Plusle
Minun

Cats/Felines
Meowth - Persian
Skitty - Delcatty
Glameow - Purugly
Shinx - Luxio - Luxray
*Eevee
*Espeon
*Entei
*Raikou

Dogs/Canines
Growlithe - Arcanine
Snubbull - Granbull
Houndour - Houndoom
Zigzagoon*
Poochyena - Mightyena
Electrike - Manectric
*Eevee
*Jolteon
*Umbreon
*Suicune

Foxes/Kitsunes
Vulpix - Ninetails
*Eevee
*Flareon
*Vaporeon
*Leafeon
*Glaceon

Bears
Teddiursa - Ursaring
Munchlax - Snorlax
Spinda

Hedgehogs
Sandslash
Shaymin

Pigs
Spoink - Grumpig
Swinub - Piloswine

Bovines
Tauros
Miltank

Lizards
Treecko
Kecleon

Chelonians (Turtles/Tortoises)
Squirtle - Wartortle - Blastoise
Torkoal
Turwtig

Monkeys/Apes
Mankey - Primeape
Aipom - Ambipom
Vigoroth - Slaking
Chimchar - Monferno - Infernape

Penguins
Piplup - Prinplup - Empoleon
Delibird

Fireflies
Volbeat
Illumise

Bag Worms
Pinceo - Forretress
Burmy - Wormadam

Silkworms
Cascoon
Silcoon

Moths
Venomoth
Dustox
Masquerain
Mothim

Butterflies
Butterfree
Beautifly

Beetles
Pinsir
Heracross

Arachnids
Skorupi - Drapion
Spinarak - Ariados

Crustaceans
Krabby - Kingler
Corphish - Crawdaunt

Seals/Sea Lions/Warlruses
Seel - Dewgong
Spheal - Sealeo - Walrein

Snakes
Ekans - Arbok
Seviper
Dunsparce

Bivalves
Shellder - Cloyster
Clamperl

Saurupods
Bayleef - Meganium
Tropius

Ducks
Psyduck
Lombre

Kappa
Golduck
Ludicolo

Anurans (Frogs/Toads)
Poliwag - Politoed
Croagunk - Toxicroak

Axolotl/Salamanders
Mudkip - Marshtomp
Wooper - Quagsire

Phoenix
Moltres
Ho-Oh

Human Athletes
Machop - Machoke - Machamp
Tyrogue - Hitmonlee - Hitmonchan - Hitmontop
Makuhita - Hariyama
Meditite - Medicham

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